<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script>
        var num = 10;
        //num = num +1;  num ++;
        // num = num +2; // num +=2 ;
        num += 2;
        console.log(num);
        var age = 2;
        age *= 3;
        console.log(age);
    </script>
</head>
<body>

</body>
</html>